Steam-injector



(Mods a1.) 2 Sheets-Sheet 1.

P. BROWNLEY.

STEAM INJECTOR.

No. 571,718. Patented Nov. 17,-1896.

ATTORIIEY.

(MMQL 2 Shets-Sheet 2.

P. BROWNLEY.

STEAM INJECTOR N0. 571,718. Patented Nov. 17, 1896.

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$45 a. @Mw m i ATTORNEY.

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UNITED STATES PATENT tries.

PATRICK BROWNLEY, OF NElV YORK, N. Y.,' ASSIGNOR TO THE BROWNLEYMANUFACTURING COMPANY, OF NEV JERSEY.

STEAM -lNJ ECTO R.

SPECIFICATION forming part of Letters Patent N0. 571,718, dated November17, 1896.

Application filed April 17,1896. Serial No. 587,928. (Modeh) To ctZZwhom it may concern: and lifter to pass direct to the atmosphere a Be itknown that I, PATRICK BROWNLEY, of vacuum is instantly created and bothsets of New York, in the county of New York and tubes serve to raise thewater into the in- State of New York, have invented certain new jector.Thus a maximum boiler supply can 5 and useful Improvements inSteam-Injectors; be constantly maintained.

and I do hereby declare the following to be a The invention will behereinafter fully set full, clear, and exact description of theinvcnforth, and particularly pointed out in the tion, such as willenable others skilled in the claims. art to which it appertains to makeand use Figure l is a view in side elevation of my an the same. improvedinjector. Fig. 2 is a vertical lon- This invention contemplates certainnew gitudinal sectional view thereof. Fig. 3 is a and usefulimprovements in steam-injectors, detail sectional View showing theposition having special reference to that class known occupied by thecock after water is lifted as litters and forcers. into the injector.Fig. 4c is a similar view The object is to increase the starting andshowing the position of said rock when the working capacity of adouble-tube injector. injector is working. This I accomplish by doublingthe lifting Referring to the drawings, A designates power of theinjector by making the set of the casting or casing; a, the steam-inlet;a, tubes constituting the forcer serve equally the water-inlet; a theoverflowopcning, and 20 with the other or lifter set of tubes in raisathe delivery-outlet leading to the boiler.

ing water into the injector. Steam is supl3 designates the forcer and Gthe lifter. plied simultaneously to both sets of tubes, Of the former, bis the steam-tube, l) the whereby the injector can be started andmaincombining-tube, and If the deli 'ery-tube, the tained at a very lowpressure, at a maximum two latter tubes being integral. Said deliv- 7 525 degree of high pressure, or at any intermecry-tube is secured in atapering or conical diatc pressure. These results are obtainable wall orpartition I)", which divides the waterbecause the only pressure to beovercome in chamber b from the delivery-chamber b of startingthe injectoris that of the atmosphere, the forcer, said latter chamber being inline since no check-valve for the primary overwith the delivery-outlet oBy thus extend- 8o 30 flow is employed. In lieu I use a cock subing thecombining-tube out in the waterstantially of the character shown anddechamber and elongating the same the water scribed inLetters PatentNo.513,378, granted in said chamber will insure better condensato meJanuary 23, 189st, said cock having tion in starting and the same willbe heated ports which, in starting the injector, open up by said tubewhen the injector is working, direct communication between thedeliverythus preventing too great condensation upon chamber of thelitter and forccr with the the water intermingling with the steam. Ofoverflow-opening, and when the column of the lifter, cl is thesteam-tube, d the combinsteam and Water is established will instantlying-tube, and (Z the delivery-tube, said latter cut off the overflow ofthe lifter and gradutubes being integral and secured in partition 0 oally out cit that of the forcer, at the same (i separating thewater-chamber (I from the time opening up direct communication bedischarge-chamber (2- The latter chamber tween the latter and the outletto the boiler. opens direct into the water-chamber b of the lIeret-oforein injectors of this class steam forcer. The steam-tubes b and d aremount could not be admitted through the foreer in ed in a wall orpartition D of a steam-cham- 5 5 starting the injector, as it would tendto her E, into which the steam-inlet CL opens, create back pressure onthe first or primary said steam-chamber being common to both ofoverflow-valve, or at least form an equilibsaid steam-tubes, so thatsteam is supplied riuni, preventing the starting of the injector,simultaneously to both sets of tubes, no valve and have the effect offorcing the steam back being employed for cutting off the supply of loo0 into the suction-pipe; but by allowing the steam to the foreer instarting the injector. initial flow of steam through both the forcer Theoutlet for the overflow from the lifter is through a passageway e,surrounding the delivery-chamber U, and substantially diametricallyopposite the outlet end of this passageway is the inner channel e of theoverflow-openin g (0 Hence, if extended, the passageway c andoverflowchannel 6 would intercept the delivery-chamber b andboileroutlet a F is a cock located transversely of the machine, so as tointercept the delivery-chamber If, the outlet a, the overflow passageway6 of the lifter, and the channel of the overflow-openin g. To one end ofthis cock is connected an operating-handle f, by which it can be easilyand quickly turned, the movement of said handle being limited bya fingerf and stops f This cock is constructed, in the main, as shown anddescribed in the before-mentioned patent. It is provided with a widetransverse opening f and opposite cut-aways f and f formingoverflow-ports for the delivery-chamber of the forcer. In starting theinjector the wide opening of the cock assumes the position shown in Fig.2, thus establishing direct communication between the passage-way e andthe overflowopening a the side f of said cock closing thedelivery-outlet a leading to the boiler. Hence the use of a check-valveto prevent back pressure from the boiler interfering with the injectoris rendered unnecessary. When the cock is in this position, the portformed by the cut-away f establishes communication between thedelivery-chamber b of the forcer and the overflow-opening a As soon,however, as the water has been lifted and the column of steam and wateris being establishedthe operator turns the cock F, causing the side fthereof to entirely out off the overflow of the lifter through thepassageway 6. (See Fig. 3.) As this is being done any further overflowfrom the forcer is allowed to pass through the port formed by thecut-away f to the overflow-opening a the further movement of the cockcutting off or closing this overflow and establishing direct communication between the delivery-chamber of the forcer and the outlet tothe boiler. (See Fig. l.)

The operation is as follows: The cock being positioned as shown in Fig.2, closing the outlet to the boiler and opening up communication betweenthe passage-way e and overflowopening a ,steam admitted to thesteam-chamber E will pass simultaneously through both sets of tubes andout to the overflow. Upon overcoming the atmospheric pressure andreaching the overflow-opening a vacuum is instantly created, not onlyinthe water-chamber of the lifter, but also in the chamber of the forceror body of the casing, causing the immediate lifting of water, which,passing through the combining and delivery tubes of the lifter, willpass from the discharge-chamber of the latter through the passage-Way cand opening f of cock F to the overflow-opening a and the overflow ofthe forcer passes to said opening a through the cut away f". As soon asthe column is established, or about to be, the cock is turned, cuttingoff immediately the overflow of the lifter and gradu ally that of theforcer, (see Fig. 3,) and the now established column of steam and waterwill pass through the opening in the cock on to the boiler, said cockbeing turned to the position shown in Fig. 4.

The advantages of my invention are apparent to those skilled in the art.No check valve for the overflow of the lifter being employed and onlythe atmospheric pressure having to be overcome, and steam being admittedsimultaneously to both sets of tubes, the forcer also acts as a litter,thus doubling the capacity of the apparatus. The injector can be startedat a low pressure and can be continuously operated at such a pressure orat a very high pressure of steam, or at any intermediate pressure. Thereis a decided acb vantage in the employment of a cock for controlling theoperation of the injector, since the cock being of substantially conicalor cylindrical form and extended transversely through the injector atright angles, so to speak, to the line of travel of the steam and waterthere is but little, if any, pressure to be overcome in turning saidcock. It will also be noted that the overflow of the forcer is onlygradually cut 0d, thus allowing any additional overflow from the latter,after the closing of the overflow of the lifter, to pass to the openinga An injector constructed as herein described is extremely simple andinexpensive and, be in g composed of but few parts, is not liable toreadily get out of order. The single cock employed for controlling theworking of the injector being positive in its action is not affected byany clogging of foreign or gritty substances, as frequently occurs withlooselymounted valves.

I claim as my invention- 1. A double-tube injector having directcommunications for the forcer and lifter with the overflow-opening,means for positively closing the boiler-passage in starting the injectorand a single steam-chamber common to both said lifter and forcer wherebysteam is supplied simultaneously thereto in starting the injector, asset forth.

2. A double-tube injector having separate overflows for the lifter andforcer, a cock for quickly closing the overflow of the lifter andgradually closing that of the forcer and a steam-chamber for supplyingsteam simultaneously to both the lifter and forcer in starting theinjector, whereby the forcer will also act as a lifter, as stated.

3. A steam-injector of the character herein specified havingoverflow-passages for the litter and forcer and a cock intercepting saidoverflows having three ports, one of said ports allowing of the gradualclosing of the overfiow of the fol-oer after the overflow of the lifteris closed, as stated.

4. A steam-injector of the character herein specified havingoverflow-passages for the lifter and foroer, and a cook having a mainopening or port extending transversely there- 'throngh, and two smallerports for the overflow from the forcer, as set forth.

5. A steam-injeotor of the character herein specified havingoverflow-passages for the lifter and foroer, and a cock having a mainopening or port extending transversely therethrongh, and two oppositeout-aways forming ports for the overflow from the foreer, as set forth.

6. The herein described steam -injector having two sets of tubes forminga foreer and ing witnesses.

PATRICK BROWNLEY. lVitnesses:

LoUIs O. VAN DOREN, WILLIAM S. SMITH.

